Author Topic: witch cam to choose from  (Read 8691 times)

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penske2704

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witch cam to choose from
« on: July 05, 2010, 10:42:25 PM »
i just put a fresh engine and now i iam redy to cam it
i done some reserch and found 3 companies how carry them

- hesco rv cam
- clifford
- and this one for 50 $ ----http://chucker54.stores.yahoo.net/moje2ca.html---

what you guys think i should put in and i want it to be bolt on and dont want to do extreme head work

tank for the help

by the way 1998 tj whit 95 yj engine tj fuel rail and injector  5 speed 4.10 gear

Offline dwtaylorpdx

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Re: witch cam to choose from
« Reply #1 on: July 05, 2010, 11:03:08 PM »
I have the Hesco, it pulls very well, but you will have to put new valve springs on due to its lift and profile.
The Hesco unit is ground by CLay Smith ,,, good name at least...

Dave
94 YJ - 2.5 Hesco Cam B&B Ported - AX5 Trans w/Centerforce Dual Friction Clutch - 4" Rough Country Lift W/Skyjacker Shocks - D44 Rear/ARB - D30/ARB - ARB Compressor - Warn M8000 in Custom Bumper - Reunell Rear Bumper - Metalcloak 6" Body Armor Kit - Tuffy Console - 265x85-16 Tires - 2M Radio

penske2704

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Re: witch cam to choose from
« Reply #2 on: July 05, 2010, 11:16:52 PM »
compared to your original cam was it worth it ? what kind of improvement did i made ?   

Offline dwtaylorpdx

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Re: witch cam to choose from
« Reply #3 on: July 05, 2010, 11:25:30 PM »
Well, id say a lot... Its hard to separate cause I did the whole motor
at one time including raising the compression a point and doing a full
balance and blueprint.

I found the Hesco guys had a lower BS factor than the Clifford guy I talked to.
Hesco understood my issue with smog testing and the Clifford guys kept
blowing it off as no big deal, trying to convince me I'd be better off with a 4 barrel...

Mine hits hard enough to piss off my wife if I shift too hard....
I also pretty much climb any freeway hill in 5th including over the Rockies...
I have 4.56 gears and 33" tires.
I can also easily get up to 95,,, I used to top out at 85.

Dave
94 YJ - 2.5 Hesco Cam B&B Ported - AX5 Trans w/Centerforce Dual Friction Clutch - 4" Rough Country Lift W/Skyjacker Shocks - D44 Rear/ARB - D30/ARB - ARB Compressor - Warn M8000 in Custom Bumper - Reunell Rear Bumper - Metalcloak 6" Body Armor Kit - Tuffy Console - 265x85-16 Tires - 2M Radio

penske2704

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Re: witch cam to choose from
« Reply #4 on: July 06, 2010, 08:03:35 AM »
nice i wish my jeep i  could doo that !!

and by balancing and blue printing... did you did someting to the head ??? beside machine work for stiffer spring
because i wondering whats gona happend if i shave deck to raise compression and install new cam whit stiffer spring are my lifter gona take it or i will have to replace for sorter push rod ?

Offline sharpxmen

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Re: witch cam to choose from
« Reply #5 on: July 06, 2010, 08:57:37 AM »
nice i wish my jeep i  could doo that !!

and by balancing and blue printing... did you did someting to the head ??? beside machine work for stiffer spring
because i wondering whats gona happend if i shave deck to raise compression and install new cam whit stiffer spring are my lifter gona take it or i will have to replace for sorter push rod ?

if you raise compression you most likely will need to run a higher octane fuel

i think dwtaylor has roller rockers and probably are adjustable. depending on how much you take off the cyl head and block will result in that much more preload - you'll have to figure out if the pushrods need to be replaced.

for his engine if he was getting to 85mph with 120HP for 95mph he's making about 150HP (just rough math, nothing exact and it's all percentage based, the top speeds won't be at the same rpm so don't take this as being anything but approximation)

you'll also need a way to add more fuel somehow, just replacing the cam won't give you that much of an increase so plan for that as well (raising compression will improve engine efficiency but not by 25%, you will get more air into the cylinders with a more aggressive cam and to take advantage of that you need more fuel).

'95 YJ, NSG370 6spd / Hurst shifter, Dana 300 + 4:1 Doubler / tri-stick, Custom skid, Super D35 / Auburn LSD / 4.88, 35x12.5x15 BFG KM2, 64mm t/b, 1.7 RollerRockers, MkVIII e-fan, Dual Diaph Booster
Latest: Corbeau BajaRS heated seats :dance: keeping warm the rear end

penske2704

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Re: witch cam to choose from
« Reply #6 on: July 06, 2010, 10:51:33 PM »
i need to do reserch to find witch injector to put whit the cam i iam gona get i thik the best way is to fing some one whos engine is buit a certain way and do the same thing

 i have found 26 lbs injector that fit so maybe they are gona go in after a cam swap

Offline sharpxmen

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Re: witch cam to choose from
« Reply #7 on: July 06, 2010, 11:51:54 PM »
i need to do reserch to find witch injector to put whit the cam i iam gona get i thik the best way is to fing some one whos engine is buit a certain way and do the same thing

 i have found 26 lbs injector that fit so maybe they are gona go in after a cam swap

can't remember if you have a YJ or TJ, if it's a YJ 26 is too much, if it's TJ then you'll need to run some numbers, if it's 26lb/hr at 43.5psi injector your TJ runs at 49psi so the actual flow will be higher than that (and again could be too much)
'95 YJ, NSG370 6spd / Hurst shifter, Dana 300 + 4:1 Doubler / tri-stick, Custom skid, Super D35 / Auburn LSD / 4.88, 35x12.5x15 BFG KM2, 64mm t/b, 1.7 RollerRockers, MkVIII e-fan, Dual Diaph Booster
Latest: Corbeau BajaRS heated seats :dance: keeping warm the rear end

penske2704

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Re: witch cam to choose from
« Reply #8 on: July 07, 2010, 08:10:14 AM »
yes it is a tj
one other ting i need to check is my fuel pressure i iam in not sure it is getting 49 psi 
but how you check your psi . idle or wot



Offline sharpxmen

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Re: witch cam to choose from
« Reply #9 on: July 07, 2010, 08:32:20 AM »
yes it is a tj
one other ting i need to check is my fuel pressure i iam in not sure it is getting 49 psi 
but how you check your psi . idle or wot


for TJ should be 49psi accross the board (idle, wot or under load)

26lb/hr at 43.5psi = 27.6 lb/hr at 49 psi

vs 23.2 lb/hr stock is 19% more - i think it is a bit too much (my opinion) but you should measure the AFR at full load to know for sure
'95 YJ, NSG370 6spd / Hurst shifter, Dana 300 + 4:1 Doubler / tri-stick, Custom skid, Super D35 / Auburn LSD / 4.88, 35x12.5x15 BFG KM2, 64mm t/b, 1.7 RollerRockers, MkVIII e-fan, Dual Diaph Booster
Latest: Corbeau BajaRS heated seats :dance: keeping warm the rear end

penske2704

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Re: witch cam to choose from
« Reply #10 on: July 07, 2010, 09:02:27 AM »
how do you calculate the flow rating vs the pressure i dont get it  ???

so how should i chose a injector thats gona be right for a new cam ?? is it gona be try see...
well i should probably start by getting a cam and istall it whit my friend and a couple of beer  :beers:
then i check the colour of my plugs to get a nice reading of the mixture

Offline sharpxmen

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Re: witch cam to choose from
« Reply #11 on: July 07, 2010, 09:49:42 AM »
how do you calculate the flow rating vs the pressure i dont get it  ???

so how should i chose a injector thats gona be right for a new cam ?? is it gona be try see...
well i should probably start by getting a cam and istall it whit my friend and a couple of beer  :beers:
then i check the colour of my plugs to get a nice reading of the mixture

read this post in the FAQ http://4bangerjp.com/forums/index.php/topic,3479.msg52986.html#msg52986 - there's a formula in there and some other info about injectors.

you can also use an online calculator from here http://www.csgnetwork.com/fiflowcalc.html but keep in mind that you need to know what pressure the flow is rated at for the injectors you are looking at (most are commonly rated at 43.5psi or 3bar but some are rated at the operating pressure on the engine like for TJ at 49 psi or YJ at 39psi)

btw, thanks for the link on that $50 Mopar Cam from Mancini Racing, i placed an order for one - at $75 including shipping it's well worth it, now i need to find some suitable valve springs so if you come across anything decent let me know.
'95 YJ, NSG370 6spd / Hurst shifter, Dana 300 + 4:1 Doubler / tri-stick, Custom skid, Super D35 / Auburn LSD / 4.88, 35x12.5x15 BFG KM2, 64mm t/b, 1.7 RollerRockers, MkVIII e-fan, Dual Diaph Booster
Latest: Corbeau BajaRS heated seats :dance: keeping warm the rear end

penske2704

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Re: witch cam to choose from
« Reply #12 on: July 07, 2010, 10:09:38 AM »
so i presume it is a good cam the mopar one at 50 $
and  beside valve spring are they other mecanical mod needed to keep up whit this one
because i will place and order too if its good

 

Offline Bounty Hunter

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Re: witch cam to choose from
« Reply #13 on: July 07, 2010, 12:15:52 PM »
now i need to find some suitable valve springs so if you come across anything decent let me know.
I used Mopar v8 springs when I installed my Mopar Perf. Cam, should still be readily available.  Need the part number?

Offline sharpxmen

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Re: witch cam to choose from
« Reply #14 on: July 07, 2010, 03:04:38 PM »
I used Mopar v8 springs when I installed my Mopar Perf. Cam, should still be readily available.  Need the part number?

that would be great if you have it handy. thanks Bounty  :thumbsup:
'95 YJ, NSG370 6spd / Hurst shifter, Dana 300 + 4:1 Doubler / tri-stick, Custom skid, Super D35 / Auburn LSD / 4.88, 35x12.5x15 BFG KM2, 64mm t/b, 1.7 RollerRockers, MkVIII e-fan, Dual Diaph Booster
Latest: Corbeau BajaRS heated seats :dance: keeping warm the rear end